Last night I gathered together four guildmates to head into Heroic Slave Pens and take on the new seasonal boss, Ahune. Getting to him was easy enough, though he appears towards the middle of the first large cavern, which meant that we had to clear out a couple of extra mob groups.
I won't delve into his abilities too much since that's already covered elsewhere, but I will say that we had several wipes as we tried to figure out the encounter, each time getting him slightly closer to death, but the sheer number of little water elementals he spawns kept overwhelming us (and the ice spikes certainly didn't help). After seeing how little damage and hit points these little guys did, we decided to go all out offense. I switched out my tanking gear for my epic PvP suit, wielded a two-hander and spent most of the fight in fury stance (as the main tank). It was a hectic fight, and I had a couple of close calls (the damaging debuff that the main add puts on you is pretty rough), but we emerged victorious! The smaller adds only have 2000 hit points, so it was pretty easy to bring them down with all of us targeting them. With both myself and another warrior using whirlwind, we were able to work over the elite rock elemental at the same time. Then, when Ahune was vulnerable, we were already in the proper stance for damage. Couple fury stance with Blood Fury and Death Wish and you have some serious damage output! Our group makeup was two arms warriors, one elemental shaman, one beastmaster hunter and one holy priest.
Overall a fun fight, though expect to have a few wipes when you're first learning the encounter.